chrome-extension-development SKILL.md skillA
chrome-extension-development from mindrally/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mindrally/skills/chrome-extension-development@git:20261008.7682ca7Pins git:20261008.7682ca7 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mindrally/skills
- Path
chrome-extension-development/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261008.7682ca7, committed Oct 8, 2026
- First version recorded
- Jan 23, 2026
- Size
- 6,712 bytes
- Repository stars
- 278
- License
- Apache-2.0
Expert guidelines for Chrome extension development with Manifest V3, covering security, performance, and best practices. Use when building browser extensions, creating popup UIs, implementing content scripts, working with Chrome APIs, managing extension permissions, or publishing to Chrome Web Store.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Chrome Extension Development This skill provides expert-level guidance for Chrome extension development, covering JavaScript/TypeScript, browser extension APIs, and modern web development practices. ## Workflow: Building a Chrome Extension from Scratch 1. **Initialize the project** — Create the directory structure with `manifest.json`, background service worker, content scripts, and popup files. 2. **Configure the manifest** — Define permissions, content script matches, service worker registration, and action settings in Manifest V3 format. 3. **Implement the background service worker** — Set up event listeners for extension lifecycle, messaging, and alarms using the `chrome.*` API. 4. **Build content scripts** — Write scripts that interact with web page DOM, communicate with the background worker via `chrome.runtime.sendMessage`, and respect CSP. 5. **Create the popup UI** — Design the popup HTML/CSS and wire up interactivity with the background and content scripts. 6. **Add storage and state management** — Use `chrome.storage.local` or `chrome.storage.sync` to persist user settings and extension state. …
Read the whole file at its exact version.
How to install
mdr add mindrally/skills/chrome-extension-development@sha256:ad47a5811991e78dThe line at the top of this page pins the label git:20261008.7682ca7, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_bxloctndyav6c6j2)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jan 23, 2026 and Oct 8, 2026, about one every 129 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261008.7682ca7 latest | 2026-10-08 | 7682ca7 | 6,712 B | A | view · diff |
| git:20260416.816934f | 2026-04-16 | 816934f | 6,632 B | A | view · diff |
| git:20260123.47f47c1 | 2026-01-23 | 47f47c1 | 3,167 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6712 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
mindrally/skills · 278 stars · license Apache-2.0 · pushed 2026-10-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_bxloctndyav6c6j2 GET https://markdownregistry.com/api/v1/resolve?ref=mindrally/skills/chrome-extension-development GET https://markdownregistry.com/api/v1/blob/ad47a5811991e78d30834f5c3f03f4020279134d91cdf30c408b65e907adad4a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.